Question: Who became Secretary-General of the United Nations on 10th April 1953?
Paraphrase: On April 10, 1953, who became Secretary General (UN)?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q81066 p:P1308 ?s . ?s ps:P1308 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1953')) }